Abstract: The invention discloses a multichambered structure for a rotary kiln.At least three bases are formed from radial blocks equidistantly spaced about and adjustably attached at one surface thereof to the inner surface of the steel shell, each base extending axially along the steel shell and on the surface opposite the attachment having a profile therein for accepting spoke blocks. The chamber walls are formed from spoke blocks with each of the walls extending radially from one of the bases and axially along the length of the base to the center portion of the cylindrical body. The spoke blocks are specially configured with one side thereof having a profile complementary to the radial blocks for mating therewithin and the side opposite thereof a profile for accepting additional ones of the spoke bricks. Additionally, a hub assembly formed from specially configured hub segments interlocks with the spoke bricks of the three walls and extends axially along the centralmost portion of the walls.